22POINTS PLEASE HELP Question#1 An ecologist wants to investigate the effects of pollution on soybean plants. The
scientist grows five groups of plants and exposes four groups to various
pollutants. The fifth group is not exposed to any pollutant. The ecologist
observes the condition and growth of all the groups of plants over a period of
time. Identify the Dependent Variable, Independent Variable and Control Group in
this experiment.
Question#2 A Biology class wants to investigate what concentration of a salt solution is most
effective in preventing the growth of bacteria. Students prepare five dishes of
agar (a gelatin-like substance used to cultivate living material). They spread
solutions of different salt solutions on four dishes, leaving one dish untouched.
They then introduce bacteria on all the dishes and observe the dishes for the
amount of bacterial growth. Identify the Dependent Variable in this experiment.
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